Can I make dynamic styles in React Native?

I usually do something along the lines of:

<View style={this.jewelStyle()} />

…

jewelStyle = function(options) {
   return {
     borderRadius: 12,
     background: randomColor(),
   }
 }

Every time View is rendered, a new style object will be instantiated with a random color associated with it. Of course, this means that the colors will change every time the component is re-rendered, which is perhaps not what you want. Instead, you could do something like this:

var myColor = randomColor()
<View style={jewelStyle(myColor)} />

…

jewelStyle = function(myColor) {
   return {
     borderRadius: 10,
     background: myColor,
   }
 }